Poor man’s Wired or Wireless Spy Camera (v1) – Part 1
In this article, I’ll dig into everything you need to know when it comes to the build of your own minuscule wired/wireless spy camera system. Since the spy camera itself is one of the most […]
CMOS Toggle Switch with CD4049
Here’s a simple and clever way to build a toggle switch with a quite popular, highly available, and cheap CMOS logic chip CD4049UB. Since the little electronic toggle switch presented here is an easy to […]
An Easy 555 EC Sensor!
Aware that a particular circuit is needed to measure electrical conductivity (EC) of a liquid. Since the conduction of current through a water solution is mainly dependent on the concentration of dissolved ionic substances such […]
How to Play with a Salvaged Bipolar Stepper Motor?
Not long ago, we published an article related to this topic. This time the prime aim of this revised article is to serve as inspiration for electronics hobbyists who are making projects which involve driving […]
Midnight Security Alarm & Light Controller
What should you do when you hear a midnight door knock? Although there’s no quick answer to this question, you must keep in mind that you and your locked door may be the only obstruction […]
Avalanche Pulse Generator – An Introduction
This prefatory article focuses on Avalanche pulse generators commonly used to generate fast rise time pulses. Often fast pulses are required when measuring slew rate or propagation delay, and for sampling. Fortunately, avalanche breakdown of […]
Micro Cooling Fan Governor
The Digispark Attiny85 development board is not only for novices – it’s also a tiny but great microcontroller development board for matured electronicists. Sure, the Digispark board offers almost everything you need i.e. digital I/Os […]
Poor man’s Bluetooth Microphone
A family party or a small get together, we all need some stunning music there to lighten up the festive mood. Well, today I’m going to talk about a simple do-it-yourself project that will give […]
An Isolated Power MOSFET Switch
I volunteered to design a simple and inexpensive isolated power mosfet switch to control some electric loads by a ‘pulsed’ low-voltage input signal. There are of course superb solid state relays (SSRs) that we could […]
The Mysterious Laser Receiver Sensor Module!
This article introduces a laser receiver sensor module available on the web. The module, named “Laser Receiver Module Non-modulator Tube Laser Sensor Module”, comes as a cheap module usually without a user guide. So it […]